JPH03114683A - Ultrasonic joining method - Google Patents

Abstract

PURPOSE:To firmly ultrasonic-join a columnar member to the inside of a cylindrical member and to reduce the cost by inserting the columnar member into the cylindrical member on which a cut groove in the axial direction of the cylindrical member is formed, fixing the cylindrical member on a pedestal and subjecting the column member to ultrasonic vibration to join both members together. CONSTITUTION:When the inner periphery of the cylindrical member 16 and the outer periphery of honeycomb structural body 14 are subjected to ultrasonic joining, the honeycomb structural body 14 is first inserted into the inside diameter of the cylindrical member 16 on which the cut groove 15 is formed in the axial direction and a metallic belt 19 is wound round the outer periphery of the cylindrical member 16 which is tightened and pressurized uniformly by a pressurizing cylinder 20. Both ends of the cylindrical member 16 are then fixed on the pedestal 10 via clamp members 17 and both and faces of the honeycomb structural body 14 are held between ultrasonic vibrators 11. The ultrasonic vibrators 11 are then subjected to ultrasonic vibration by specified frequency by an ultrasonic oscillator 13. Heat is then generated by frictional heat between the inner peripheral surface of the fixed cylindrical member 16 and the outer peripheral surface of the sliding honeycomb structural body 14 and both members 14 and 16 are joined together.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultrasonic bonding method for bonding metal materials using ultrasonic vibration.

[Conventional technology]

Ultrasonic bonding technology, which uses ultrasonic vibrations to weld and bond two metal plates, is currently widely used in industry. As shown in FIG. 5, this method involves fixing the lower metal plate 2 of the two metal plates stacked on the anvil 1 to the anvil 1, and moving the upper metal plate 3 using an ultrasonic transducer 4 as shown in the arrow. It vibrates in the A-A direction and generates heat due to frictional heat to join. At this time, the upper metal plate 3 is moved to the lower metal plate 2 via the tip 7 by the transverse vibration rod 6 to which the load 5 is applied.
The transverse vibration rod 6 is ultrasonically vibrated by the ultrasonic oscillator 8 via the ultrasonic vibrator 4 .

On the other hand, when inserting a cylindrical member into the inner circumferential surface of a circular tube and joining the outer circumferential surface of this member to the inner circumferential surface of the circular tube, for example, a honeycomb material is inserted and bonded into the outer tube, which is a metal carrier. In some cases, brazing or metal diffusion methods were used.

[Problem to be solved by the invention]

Among the conventional techniques described above, ultrasonic bonding allows flat metal plates to be bonded together, but it is impossible to insert and bond a cylinder into a circular tube because pressure cannot be applied.

On the other hand, when using the brazing method or metal diffusion method,
There was a problem in that the workpiece had to be kept in a high temperature state for a long time, resulting in high costs.

For example, when inserting and bonding honeycomb material to a metal carrier,
For the brazing method it had to be held at 1190°C for 20 minutes, and for the diffusion method it had to be held at 1300°C for 70 minutes.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a simple and low-cost ultrasonic welding method that can perform ultrasonic welding by inserting a cylindrical member into a cylindrical member.

[Means to solve the problem]

In order to achieve the above object, the present invention fits a cylindrical member into a cylindrical member in which a groove is formed in the axial direction, and stretches a belt around the outer periphery of this cylindrical member to evenly tighten and pressurize the cylindrical member. , and the cylindrical member is joined to the cylindrical member by ultrasonically vibrating the cylindrical member.

[Effect]

According to the above method, since the cylindrical member has a groove formed in the axial direction, the cylindrical member fitted inside can be evenly tightened and pressurized by the belt, and therefore the cylindrical member can be fixed to the base. By ultrasonically vibrating the cylindrical member 3-, ultrasonic bonding becomes possible.

〔Example〕

Hereinafter, one embodiment of the ultrasonic bonding method according to the present invention will be explained with reference to the drawings. Figs. 1 to 3 show an apparatus used in this embodiment.

A pair of ultrasonic transducers 11 are mounted on a support member 12 on a base 10.
The ultrasonic oscillator 13 generates ultrasonic vibrations. A pair of ultrasonic transducers 11 are arranged on the same center line parallel to the base 10, and both end surfaces of a honeycomb structure 14, which is a cylindrical member, are sandwiched between them.

A cylindrical member 16 in which a groove 15 is formed in the axial direction is attached to the outer periphery of the honeycomb structure 14, as shown in FIG.

Both ends of the cylindrical member 16 are supported by clamp members 17 provided on the base 10, respectively.

The clamp member 17 consists of an upper member 17a and a lower member 17b each formed in a semicircular shape, and the outer peripheral end of the clamp member 17 fits into the inner periphery of the opposing surface of each member 17a, 47b. A stepped portion 17c is formed. Then, only the cylindrical member 16 is held between the members 17a and 17b, and the bolts 18 are tightened to form the base 1o.
It is fixed at Further, a metal belt 19 is wound around the outer periphery of the axially intermediate portion of the cylindrical member 16, and pressure cylinders 20 are attached to both ends of the metal belt 19. Then, the metal belt 19 is pressed by the pressurizing cylinder 20.
is tightened, and the cylindrical member 16 is evenly pressurized against the honeycomb structure 14.

Next, a method of ultrasonically bonding the inner periphery of the cylindrical member 16 and the outer periphery of the honeycomb structure 14 using the apparatus configured as described above will be described. For example, when manufacturing a metal carrier by ultrasonically bonding a cylindrical member 16 to a honeycomb structure 14 with a diameter of 121 m, the honeycomb structure 14 is first inserted into the inner diameter of the cylindrical member 16 in which the kerf 15 is formed in the axial direction. Then, a metal belt 19 is wound around the outer periphery of the cylindrical member 16 and tightened by a pressure cylinder 20 to apply pressure evenly.

Next, both ends of the cylindrical member 16 are fixed to the base 10 via clamp members 17, and both end surfaces of the honeycomb structure 14 are clamped between the ultrasonic vibrators 11. When the ultrasonic vibrator 11 is ultrasonically vibrated at a frequency of about 18 KHz by the ultrasonic oscillator 13, frictional heat between the inner peripheral surface of the identified cylindrical member 16 and the outer peripheral surface of the vibrating honeycomb structure 14 is generated. Heat is generated and the two members 14 and 16 are joined.

After the joining is completed, the integrated metal carrier is removed from the ultrasonic oscillator 11 and the clamp member 11, and the groove 15 of the cylindrical member 16 is welded by arc welding or the like, as shown in FIG. 4, to complete the metal carrier. do.

According to this embodiment, the cylindrical member 1 is
6 is fixed and the outer periphery is tightened with a metal belt 19, thereby making it possible to ultrasonically bond the cylindrical member 16 and the honeycomb structure 14.

Therefore, joining can be performed without using the conventional brazing method or metal diffusion method, reducing costs and shortening the joining time.

Although the above embodiment describes the case of manufacturing a metal carrier, it can also be applied to the case where a cylindrical member is fitted into another cylindrical member and subjected to ultrasonic bonding, and similar effects can be obtained.

〔Effect of the invention〕

According to the present invention described above, the cylindrical member is fitted into a cylindrical member in which a cut groove is formed in the axial direction of the cylindrical member, the cylindrical member is fixed to the base, and the cylindrical member is joined by ultrasonic vibration. , it becomes possible to firmly ultrasonically bond the cylindrical member into the cylindrical member, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an apparatus used in an embodiment of the ultrasonic bonding method according to the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG.
4 and 4 are perspective views showing a state in which a cylindrical member is fitted into a cylindrical member before and after welding, respectively, and FIG. 5 is an explanatory view showing the configuration of an ultrasonic welding apparatus. 7- 10... 14... 15... 16... 19... Base, cylindrical member (honeycomb structure), kerf, cylindrical member, metal belt.

Claims (1)

[Claims] (1) A cylindrical member is fitted into a cylindrical member in which a groove is formed in the axial direction, a belt is stretched around the outer periphery of the cylindrical member, and the belt is evenly tightened and pressurized, and the cylindrical member is fixed to a base. An ultrasonic bonding method characterized by bonding to the cylindrical member by ultrasonic vibration.